Electric cartridge-fuse.



R'. KOEN. ELECTRIC CARTRIDGE Fuse.

APPLICATION FILED FEB. 241 |915.

Patented July 11,1916.

P :Em-

lll/A elevation.

'ELECTREC CARTRIEEGE-FUSE.

income.

l.spplisation filed February :2%. 297i?.

T o all whom t 'may conce/m:

Be it known thatd, firmano R. KOEN, a

citizen of the United States,l residing at Flat River, in the county of St Francois, State oli Missouri, have invented. certain new and useful Improvements in Electric Cartridge- Fuses; and I do hereby declare the following to be a lull, clear7 and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to new and useful improvements in electric cartridge fuses.

An object of the invention resides in constructing the fuse in such manner that the fusible strip is detachably secured within the` barrel or shell so that after having been broken by an overload on the. circuit in which it is :interpolated it may be, removed and replaced by a new strip.

A further object of the invention resides in so constructing the device that the removal ci' the old or fused strip and there, placing of it by a new strip may be accomplished speedily and with very little trouble.

A further object of the invention resides in so constructing the device that the strip will be effectively clamped in place on the blades.

A still further'object resides in the provision oi common means for producing the clamping action on the ends of the fusible strip and. or attaching the caps to the barrel.

With these and other objects in View, such as will appear as the description progresses, my invention comprises the combination and arrangement of parts as set 'forth in and falling within the scope of the ap pended claims.

Referring to the drawing: Figure l is a longitudinalsectional view of a fuse constructed in accordance with my invention, looking at the clamping side of the blades showing the same and the fusible strip in Fig. 2 is a perspective View of the blades and the fusible strip with the caps and the barrel removed. Fig. 3 is a section on line BH3 of Fig` l, showing the relation of the blades, the fusible strip and the wedge blocks. Fig. d is a sectional view taken longitudinally ,of one of the blades, showing the cooperation of the adjacent block and. the blade to clamp the fusible strip.

Referring to the drawing wherein like Serial No. 1051559.

arts are indicated by lilL ironghont the several views:

prevented from outward movement beyond a predetermined point by shoulders o on the said blades. "lhese blades are made or a strip or' heavy metal such as copper or the like. This strip is bent back upon itself,

'as indicated in the drawingnl and secured together by rivets 6. 'lhe inner end ot each. of these blades is provided with cppositelv extending lugs 7 which extend into slots in the barrel l and pr vent the rotation of the blade and adjacent cap with relation to the barrel.

ln order that v4'the illisible strip 8 which extends from one blade to the other may be secured to the blades, l have constructed the inner end of cach of the blades with spaced arms which extend outwardly from the plane of the blade. rlhese arms are constructed with inclined portions l() and per pendicular end portions 'll and a slot f2 is provided between the said. arms, the purpose of which will later appear. The perpendicular portions l1 have cut-out portions 13.

Detachably mounted on the end of each of the blades 3 is a clamping block which has a body portion l5 adapted to extend upwardly through the space 12 between the arms 9 and wedge-shaped flanges 16 adapted to pass through the cnt-out portions liand ride beneath the arms 9. The upper or cani faces l? of the iianges are adapted to bear against the lower faces i8 oit the inclined portions of 'the arms il so that the clampingn block is drawn inwardly into the space '12 between the arins 9 a clamping action will be produced between the said block andthe base of the blade 3. Now when the end of the fusible strip 8 is interposed between the said base and the clamping block unen the inward movement oli the clamping block it will be clamped in position and el'ectivelvsecured to the blade. ln order that t--ls clamping action may be elicctive. l have provided the body portion 15 or each bloclr 14 with a threaded hole and the adjacent cap 2 with a hole through which a screw i9 passes, the tightening of which screw will cause the block 15 to clamp the adjacent end FII of the fusible strip and maintain the blade, barrel and cap in rigid relationship.

From the foregoing description it Will be Seen that I have provided a cartridge fuse in which the fusible strip may be speedily removed and replaced by a new strip.

It will be further seen that I have so constructed the device that the fusible strip will be frictionally clamped on the blades. I have further so constructed the blades, the clamping block and the caps that but a single screw is necessary to clamp one end of the fusible strip and the adjacent blade and cap. l

I have further constructed the device so that fusible strips of various thiclmesse may be maintained ,in position therein.

While I have illustrated and described a particular embodiment of my invention I have merely done so for the sake of convenience and I do not wish to be limited to that particular embodiment as it is obvious that numerous changes may be made within the details of construction thereof without in any Way departing from the spirit of the invention or exceeding the scope of the appended claims.

What I claim is l. In a cartridge fuse, the combination with an insulating barrel having slots in one end thereof, of a cap mounted on said end, a blade extending through said cap and having lugs extending into said slots, a

clamping block slidably mounted on said blade/ i fusible strip having end diposed between the sliding block and bl; and having its other end secured to the opposite end of the barrel, the said blade having cain faces thereon cooperating with said clamping block to force the same into engagement with the strip and a screw in threaded engagement, with the clamping block and extending through the cap to eiiect the clamping i ation between the said block and base te maintain trie cap upon the end of the barrel.

2. In a cartridge i'usei the combination with a blade having spaced arms extending outwardly from one end oi the base tliereo''", the said arms being inovided with inclined portions and portions perpeiniicular to the base, and a clamping block having a body portion extending between tbe said arms and wedge-shaped portions arranged to ride beneath the inclined portions of tbe arms whereby a fusible strip may be clamped between the said clamping block and the base, upon the iniva rd movement of the clamping block.

In testimony whereof, I alix my signa; ture, in the presence ol two witnesses.

iVIIiLr/XRI) Il. K( EN.

lillitnesses (leones A. Vifsnn, .loinJ lV. ls'icl).\1\ini..

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of latenilsl .Vashington, D. C. 

